snow.css - jscancer - Javascript crap (relatively small)
 (HTM) git clone git://git.codemadness.org/jscancer
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       snow.css (1878B)
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            1 *,*::after,*::before {
            2     box-sizing: border-box;
            3     -webkit-box-sizing: border-box;
            4     -ms-box-sizing:border-box;
            5     -moz-box-sizing: border-box;
            6 }
            7 body {
            8     font-family: arial;
            9     font-size: 16px;
           10     margin: 0;
           11     background: #fff;
           12     color: #000;
           13 }
           14 .snow_wrap {
           15     height: 100vh;
           16     width: 100%;
           17     background-size: cover;
           18     background-position: center bottom;
           19     position: relative;
           20     overflow: hidden;
           21     z-index: 999999;
           22 }
           23 .snow,.snow:after,.snow::before {
           24     content: '';
           25     position: absolute;
           26     top: -650px;
           27     right: 0;
           28     bottom: 0;
           29     left: 0;
           30     background-image: radial-gradient(4px 4px at 100px 50px,#fff,transparent),
           31                       radial-gradient(6px 6px at 200px 150px, #fff,transparent),
           32                       radial-gradient(3px 3px at 300px 250px,#fff,transparent),
           33                       radial-gradient(4px 4px at 400px 350px,#fff,transparent),
           34                       radial-gradient(6px 6px at 500px 100px,#fff,transparent),
           35                       radial-gradient(3px 3px at 50px 200px,#fff,transparent),
           36                       radial-gradient(4px 4px at 150px 300px,#fff,transparent),
           37                       radial-gradient(6px 6px at 250px 400px,#fff,transparent),
           38                       radial-gradient(3px 3px at 350px 500px,#fff,transparent),
           39                       radial-gradient(4px 4px at 550px 550px,#fff,transparent);
           40     background-size: 650px 650px;
           41     animation: SnowAnim 3s linear infinite;
           42 }
           43 .snow:after {
           44     margin-left: -250px;
           45     opacity: 0.5;
           46     filter: blur(2px);
           47     animation-direction: reverse;
           48     animation-duration: 6s;
           49 }
           50 .snow::before {
           51     margin-left: -350px;
           52     opacity: 0.7;
           53     filter: blur(1px);
           54     animation-direction: reverse;
           55     animation-duration: 9s;
           56 }
           57 @keyframes SnowAnim {
           58     from {
           59         transform: translateY(0);
           60     }
           61     to {
           62         transform: translateY(650px);
           63     }
           64 }